They'll play the funeral march that's just for you.
Hayato Sakura is a normal high school boy, except for one thing: Ghosts are attracted to him. At every step he takes, ghosts (mostly of them, girls) are stick to his back, making imposibleto him to have a normal social life. At his 17th birthday, running away from them, a tall blond man walks to him and turns the ghost into butterflies. Amazed for this incredible and beautiful man, who introduce himself as Undertaker Riddle, Hayato asks him to help him with his problem and the man agrees with one condition: Hayato must make a contract with him to help him with his work of making funeral ceremonies to evil spirits.Undertaker Riddle is an ongoing manga by Akai Higasa published by Square Enix and serializated by Gangan Online.
Barrier Maiden: Faust is this to the Catacombs, as holder of the "Twilight's key". Without her, not just the Catacombs but also the human world and afterlife will be in danger. Hayato is expected to become one, as newest holder of a Twilight's key.
Batman Gambit: Dante breaked free from Roen pretendind to accept his offer of joing The Arcana, something that Roen knew he would do if it wasn't for Dante's Morality Pet Hiren melting his heart.
The Champion: Hayato's contract bonds him to Riddle in order to protect him from any attack while Riddle prepares the funeral to evil spirits.
Commonality Connection: Dante took Hiren as his partner since both were betrayed by their respective families and were both afraid of being betrayed again, so both could depend on the other without fear. Not to mention both were troublemakers.
Creepy Cool Crosses: Seeing from time to time. Justified since the main heroes are undertakers.
Dangerous Seventeenth Birthday: Hayato met Riddle and became an undertaker at his 17th birthday. Riddle actually turned him in a undertaker because Hayato's power was increasing and attracting a lot of spirits he couldn't handle alone so was better for Riddle as he had Hayato closer as his assistance.
Emotions vs. Stoicism: The undertakers are stoic and cold towards almost everyone, since they have lived so much with a job that makes them deal with dead people and evil spirits; they consider emotions as a sin since they can make you take a reckless and foolish move. Hayato, as Faust's succesor and future king must learn to balance this two things in his life to avoid becoming a cold automaton or a overemotional fool.
Expy: A teenage boy who attract ghost like bees to honey, who mades a magic contract with a mysterious person to get rip of the ghosts but instead he turns into that person's assistant? Watanuki, we found your distant cousin!